Flooding on Cottonwood Creek Deer Lodge, MT
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Flooding on Cottonwood Creek Deer Lodge, MT Montana AMFM Conference – Bozeman Wednesday, March 27, 2013 | 1:30 – 2:00 PM Brian P. Bender, AICP, CFM | Powell County Chris Laity, PE | Great West Engineering
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Flooding on Cottonwood Creek Deer Lodge, MT. Brian P. Bender, AICP, CFM | Powell County Chris Laity, PE | Great West Engineering. Montana AMFM Conference – Bozeman Wednesday, March 27, 2013 | 1:30 – 2:00 PM. Overview. Setting Event Response Projects Lessons Learned. Setting. - PowerPoint PPT Presentation
Transcript of Flooding on Cottonwood Creek Deer Lodge, MT
Flooding on Cottonwood Creek
Deer Lodge, MT
Montana AMFM Conference – BozemanWednesday, March 27, 2013 | 1:30 – 2:00 PM
Brian P. Bender, AICP, CFM | Powell CountyChris Laity, PE | Great West Engineering
Overview
o Setting
o Event
o Response
o Projects
o Lessons Learned
Setting
Cottonwood Creek’s watershed
encompasses 63 square miles
of southeastern Powell County
and flows through the City of
Deer Lodge before draining
into the Clark Fork River
Settingo Cottonwood Creek flows through the center of Deer
Lodge and most of its 3,374 residents or 48-percent of
the County’s total population reside within one mile of
the Creek
o Undersized bridges, armored banks, the loss of riparian
habitats, floodplain encroachments, and barriers to fish
movements characterize the urbanized channel
Setting
Setting
o The channel through Deer Lodge has been the
subject to repeated flood mitigation projects over
the last several decades with various levels of
success
Event
June 2011, Cottonwood Creek
flooded after a significant
rain on snow event in the
watershed
Resulting in the second
largest flood in Western
Montana.
EventCottonwood Creek flooded
through the center of Deer
Lodge causing significant
damage to public infrastructure,
private property, and habitat.
1981 Flood – 1,850 cfs (400 yr)
100 yr event – 1,140 cfs
2011 Flood – 1,015 cfs
Event
Response
Projects
NRDP – One Project
FEMA – PW’s & Second
Street Bridge
MDT – Main Street Bridge
Walk thru with Staff
Projects
Projects
Debris
Removal
Channel
Cleanup
Lessons Learned
o Prepare
o Response
o Documentation
o Work with FEMA and understand limitations
o Work with other Agencies
o Citizen Response
o Plan to prevent
Future
Contact Information
Brian P. Bender, AICP, CFM Powell County Planning Director409 Missouri Ave., Suite 101Deer Lodge, MT 59722406.846.9729
Chris Laity, PEProject Manager Great West EngineeringP.O. Box 48172501 Belt View DriveHelena, MT 59604
